<template>
  <div class="component-upload-image upload_divs">
    <el-upload multiple :action="uploadImgUrl" list-type="picture-card" :on-success="handleUploadSuccess"
      :before-upload="handleBeforeUpload" :limit="limit" :on-error="handleUploadError" :on-exceed="handleExceed"
      name="file" :show-file-list="true" :headers="headers" :file-list="fileList" :accept="accarray"
      :class="{ hide: this.fileList.length >= this.limit }">
      <i slot="default" class="el-icon-plus"></i>
      <div slot="file" slot-scope="{file}">
        <img class="el-upload-list__item-thumbnail" :src="file.url" alt="">
        <a class="el-upload-list__item-name">
          <i class="el-icon-document" />
        </a>
        <label class="el-upload-list__item-status-label">
          <i class="el-icon-upload-success el-icon-check" />
        </label>
        <span class="el-upload-list__item-actions">
          <span v-if="isdisupdate" class="el-upload-list__item-delete" @click="handleUpdate(file)">
            <i class="el-icon-edit"></i>
          </span>
          <span v-if="isdispreview" class="el-upload-list__item-preview" @click="handlePictureCardPreview(file)">
            <i class="el-icon-zoom-in"></i>
          </span>
          <span v-if="isdisdelete" class="el-upload-list__item-delete" @click="handleRemove(file)">
            <i class="el-icon-delete"></i>
          </span>
        </span>
      </div>
    </el-upload>
    <!-- <el-upload multiple :action="uploadImgUrl" list-type="picture-card" :on-success="handleUploadSuccess"
      :before-upload="handleBeforeUpload" :limit="limit" :on-error="handleUploadError" :on-exceed="handleExceed"
      name="file" :on-remove="handleRemove" :show-file-list="true" :headers="headers" :file-list="fileList"
      :on-preview="handlePictureCardPreview" :class="{ hide: this.fileList.length >= this.limit }">
      <i class="el-icon-plus"></i>
    </el-upload> -->

    <!-- 上传提示 -->
    <div class="el-upload__tip" slot="tip" v-if="showTip">
      请上传
      <template v-if="fileSize"> 大小不超过 <b style="color: #f56c6c">{{ fileSize }}MB</b> </template>
      <template v-if="fileType"> 格式为 <b style="color: #f56c6c">{{ fileType.join("/") }}</b> </template>
      的文件
    </div>
    <!-- 预览功能 -->
    <template v-if="dialogVisible">
      <el-image-viewer :on-close="() => dialogVisible = false" :url-list="[dialogImageUrl]" :zIndex="9999999" />
    </template>
    <!-- 在线裁剪 -->
    <template v-if="open">
      <userAvatar ref="imgAvatar" :src="image.url" :uid="image.uid" @ImageSrc="ImageSrc"></userAvatar>
    </template>
  </div>
</template>

<script>
import { getToken } from "@/utils/auth";
import ElImageViewer from 'element-ui/packages/image/src/image-viewer'
import userAvatar from "./userAvatar";
export default {
  props: {
    value: [String, Object, Array],
    // 图片数量限制
    limit: {
      type: Number,
      default: 5,
    },
    // 大小限制(MB)
    fileSize: {
      type: Number,
      default: 5,
    },
    // 文件类型, 例如['png', 'jpg', 'jpeg']
    fileType: {
      type: Array,
      default: () => ["png", "jpg", "jpeg", "JPG", "PNG", "JPEG"],
    },
    // 是否显示提示
    isShowTip: {
      type: Boolean,
      default: false
    },
    //update:禁用在线编辑功能
    //preview:禁用查看功能
    //delete:禁用删除功能
    // 禁用某些功能, 例如['update', 'preview', 'delete']
    isDisabled: {
      type: Array,
      default: () => []
    }

  },
  components: {
    ElImageViewer,
    userAvatar//裁剪
  },
  data () {
    return {
      number: 0,
      open: false,
      image: {},//裁剪时当前对象
      isdisupdate: true,
      isdispreview: true,
      isdisdelete: true,
      uploadList: [],
      dialogImageUrl: "",
      dialogVisible: false,
      hideUpload: false,
      // baseUrl: process.env.VUE_APP_BASE_API,
      baseUrl: '',
      uploadImgUrl: process.env.VUE_APP_BASE_API + "/file/upload", // 上传的图片服务器地址
      headers: {
        Authorization: "Bearer " + getToken(),
      },
      fileList: []
    };
  },
  watch: {
    value: {
      handler (val) {
        if (val) {
          // 首先将值转为数组
          const list = Array.isArray(val) ? val : this.value.split(',');
          // 然后将数组转为对象数组
          this.fileList = list.map(item => {
            if (typeof item === "string") {
              if (item.indexOf(this.baseUrl) === -1) {
                item = { name: this.baseUrl + item, url: this.baseUrl + item };
              } else {
                item = { name: item, url: item };
              }

            }
            return item;
          });
        } else {
          this.fileList = [];
          return [];
        }
      },
      deep: true,
      immediate: true
    }
  },
  mounted () {
    this.isshow()
  },
  computed: {
    // 是否显示提示
    showTip () {
      return this.isShowTip && (this.fileType || this.fileSize);
    },
    accarray () {
      return this.fileType.map(item => {
        return '.' + item
      }).join(',')
    }
  },
  methods: {
    isshow () {
      for (let index = 0; index < this.isDisabled.length; index++) {
        const element = this.isDisabled[index];
        if (element === 'update') {
          this.isdisupdate = false
        } else if (element === 'preview') {
          this.isdispreview = false
        } else if (element === 'delete') {
          this.isdisdelete = false
        }
      }
    },
    //在线裁剪
    handleUpdate (file) {
      console.log(file);
      this.open = true
      this.image = file
      this.$nextTick(() => {
        this.$refs.imgAvatar.modalOpened()
      })
    },
    // 裁剪成功回调
    ImageSrc (res) {
      console.log(this.fileList);
      this.fileList.forEach((item, index) => {
        if (item.uid === res.imguid) {
          this.fileList.splice(index, 1, res.data)
        }
      });
      this.$emit("input", this.listToString(this.fileList));
    },
    // 删除图片
    handleRemove (file, fileList) {
      const findex = this.fileList.map(f => f.name).indexOf(file.name);
      if (findex > -1) {
        this.fileList.splice(findex, 1);
        this.$emit("input", this.listToString(this.fileList));
      }
    },
    // 上传成功回调
    handleUploadSuccess (res) {
      this.uploadList.push({ name: res.data.url, url: res.data.url });
      if (this.uploadList.length === this.number) {
        this.fileList = this.fileList.concat(this.uploadList);
        this.uploadList = [];
        this.number = 0;
        this.$emit("input", this.listToString(this.fileList));
        this.$modal.closeLoading();
      }
    },
    // 上传前loading加载
    handleBeforeUpload (file) {
      let isImg = false;
      if (this.fileType.length) {
        let fileExtension = "";
        if (file.name.lastIndexOf(".") > -1) {
          fileExtension = file.name.slice(file.name.lastIndexOf(".") + 1);
        }
        isImg = this.fileType.some(type => {
          if (file.type.indexOf(type) > -1) return true;
          if (fileExtension && fileExtension.indexOf(type) > -1) return true;
          return false;
        });
      } else {
        isImg = file.type.indexOf("image") > -1;
      }

      if (!isImg) {
        this.$modal.msgError(`文件格式不正确, 请上传${this.fileType.join("/")}图片格式文件!`);
        return false;
      }
      if (this.fileSize) {
        const isLt = file.size / 1024 / 1024 < this.fileSize;
        if (!isLt) {
          this.$modal.msgError(`上传头像图片大小不能超过 ${this.fileSize} MB!`);
          return false;
        }
      }
      this.$modal.loading("正在上传图片，请稍候...");
      this.number++;
    },
    // 文件个数超出
    handleExceed () {
      this.$modal.msgError(`上传文件数量不能超过 ${this.limit} 个!`);
    },
    // 上传失败
    handleUploadError () {
      this.$modal.msgError("上传图片失败，请重试");
      this.$modal.closeLoading();
    },
    // 预览
    handlePictureCardPreview (file) {
      this.dialogImageUrl = file.url;
      this.dialogVisible = true;
    },
    // 对象转成指定字符串分隔
    listToString (list, separator) {
      // let strs = "";
      // separator = separator || ",";
      // for (let i in list) {
      //   strs += list[i].url.replace(this.baseUrl, "") + separator;
      // }
      // return strs != '' ? strs.substr(0, strs.length - 1) : '';
      return list
    }
  }
};
</script>
<style scoped lang="scss">
// .el-upload--picture-card 控制加号部分
::v-deep.hide .el-upload--picture-card {
  display: none;
}

// 去掉动画效果
::v-deep .el-list-enter-active,
::v-deep .el-list-leave-active {
  transition: all 0s;
}

::v-deep .el-list-enter,
.el-list-leave-active {
  opacity: 0;
  transform: translateY(0);
}

// .upload_div {
//   height: 96px;
//   width: 96px;
//   overflow: hidden;
// }

::v-deep.upload_divs .el-upload-list__item {
  width: 96px;
  height: 96px;
}

::v-deep.upload_divs .el-upload {
  width: 96px;
  height: 96px;
  line-height: 100px;
}

::v-deep.el-upload-list__item-thumbnail {
  width: 100%;

}
</style>

